The HiLumi LHC Design Study is included in the High Luminosity LHC project and is partly funded by the European Commission within the Framework Programme 7 Capacities Specific Programme, Grant Agreement 284404.

WP7 –

Conceptual Specifications

2

Machine Protection(WP7)

Quench Protection Systems (QPS)

electronics (Detection, Data

acquisition)

Energy Extraction Systems

& Heater Powering

Powering Interlock Controller (PIC)

Warm Magnet Interlock (WIC)

Fast Magnet Current

Measurement (FMCM)

Beam Interlock System (BIS)

& Safe Machine

Parameters (SMP)

Magnet related protection systems

Conceptual Specification Tree for WP7

Beam related protection systems

3April 22, 2023 D. Wollmann

4

QPS2 - Main Points• Upgrade of existing Quench Protection System.• Protection of newly installed sc. Elements (IT, sc. Links, 11T,

IPDs, … )• Ensure compatibility to increased radiation levels in tunnel.• Ensure high level of system dependability.• Possibly re-locate major part of protection electronics to

low radiation areas or surface.• New communication links for data acquisition and

supervision.• Advanced remote diagnostics and maintenance.

April 22, 2023 D. Wollmann

5

QPS2 - Plans• Protection parameters of new devices to be

specified by equipment responsibles (WP3, WP6, WP18) in collaboration with MP3.• Draft specifications for QPS2 ( ~ end 2014).• Study, which parts of the QPS could be

removed from the tunnel (~ end 2014).• R&D from 2015.

April 22, 2023 D. Wollmann

6April 22, 2023 D. Wollmann

7

EE - Main Points• Upgrade of existing Energy Extraction Systems.• Protection of newly installed sc. Elements (IT, sc. Links, 11T, IPDs, … )• Development of new generation of Extraction Switches:• Semiconductor switch

• Noise-free operation (no arcs)• Very short release times (~200us)• Highly reliable operation.• Low maintenance requirements.• High on-state losses (water cooling required)

• Hybrid switch (electro-mechanic switch parallel to semiconductor switch)• Noise-free operation (no arcs)• Release times ~20ms.• Highly reliable operation.• Low maintenance requirements.• Low on-state losses.

• New design of extraction resistors:• Very fast recovery time (cooling).• Compact design.• Easily changeable resistance

April 22, 2023 D. Wollmann

8

EE - Plans• Protection parameters of new devices to be

specified by equipment responsibles (WP3, WP6, WP18) in collaboration with MP3.• Prototype of 10kA switch expected in second

half of 2015.• Prototype Extraction Resistor (10MJ, 1500V)

expected in second half of 2015.

April 22, 2023 D. Wollmann

9April 22, 2023 D. Wollmann

10

PIC - Main Points• Upgrade of existing Powering Interlock System (36 PICs for

28 powering subsectors).• Ensure compatibility to changes and new requirements

from QPS2.• Ensure high level of system dependability.• Ensure compatibility to increased radiation levels in tunnel Design of new I/O module for distributed use.• Upgrade of used industrial components due to

obsolescence of components new I/O module.• Enhanced diagnostics of safety critical hardwire loops.

April 22, 2023 D. Wollmann

11

PIC - Plans• R&D from 2015.

April 22, 2023 D. Wollmann

12April 22, 2023 D. Wollmann

13

WIC - Main Points• Upgrade of existing Warm Magnet Interlock

System (8 industrial controllers).• Improvements of existing system (upgrade

electronics and industrial components) to ensure current dependability.• Accommodate changes and new requirements of

the magnet powering system in the IRs.• Increase of radiation levels my require re-design of

some parts or the WIC.April 22, 2023 D. Wollmann

14

WIC - Plans•Main part of work between LS2 and LS3.

April 22, 2023 D. Wollmann

15April 22, 2023 D. Wollmann

16

FMCM - Main Points• Upgrade of Fast Magnet Current Change

Monitors (currently 26 units in LHC and SPS-LHC transfer lines).• Review and potentially re-design of hardware due

to aging and obsolescence of electronic parts• Improved maintainability.

April 22, 2023 D. Wollmann

17

FMCM – Plans• Input required from WP3 and WP2.• Study new HL-LHC failure modes.• R&D from 2015.

April 22, 2023 D. Wollmann

18April 22, 2023 D. Wollmann

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BIS & SMP - Main Points• Consolidation of current BIS and SMP.• Re-design of system:

• Obsolescence of electronic components.• Optical links.• Increased number of input channels.• Improved flexibility of user input configuration.• Very fast interlock channels of feasible.• Advanced diagnostics for system HW and optical links.• Improved maintainability.• Reach reliability level as current system (SIL3).• Revision of high level and controls software.

April 22, 2023 D. Wollmann

20

BIS & SMP – Plans• Number of required BIS channels to be

specified by MPP.• Study feasibility of very fast interlock channels.• R&D from mid 2014.

April 22, 2023 D. Wollmann